If you are stuck and simply want to bypass the puzzle to continue the story, here is the direct solution:
The in the adult adventure game Lust Epidemic
Each room corresponds to a specific number position on the keypad panel.
Navigate to the main security hub situated on the ground floor of the building.
The elevator code won’t appear until you have spoken to the right characters. Make sure you have:
Mastering the Lust Epidemic Elevator Security Code: Ultimate Walkthrough
[Approach Elevator Keypad] âž” [Interact with Screen] âž” [Type 5391] âž” [Press Enter/Confirm]